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Family name Янно (Janno , Янно ) , all around the world, is a rare cognomen. The surname Янно is characteristic of Estonia, where it is quite a rare surname, Saudi Arabia, where it is a rare surname, and Ethiopia, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Estonia, Ethiopia, and India. More frequently, Янно is the forename as well as the last name.